Analog Devices Inc. ADA4841-2YRZ

Overview

ADA4841-2YRZ from Analog Devices is a dual, rail-to-rail output, voltage-feedback operational amplifier optimized for low-noise, low-distortion signal conditioning in precision analog front-ends. It delivers 2.1 nV/√Hz input voltage noise, −105 dBc third-harmonic distortion at 100 kHz, and 80 MHz −3 dB bandwidth (G = +1) while consuming only 1.1 mA per amplifier at ±5 V. It drives 16-bit PulSAR® ADCs such as the AD7685/AD7686 with minimal settling error.

For engineers reviewing the ADA4841-2YRZ datasheet, ADA4841-2YRZ pinout, ADA4841-2YRZ application, or ADA4841-2YRZ equivalent, key selection criteria include its matched input offset voltage (70 µV max), 175 ns 0.1% settling time at 2 V step, 12 V/µs slew rate, and operation across 2.7 V to 12 V supplies - all critical for battery-powered instrumentation and high-channel-count data acquisition systems.

Technical Context

The ADA4841-2YRZ employs a precision PNP input stage and symmetrical folded cascode architecture on Analog Devices' XFCB process, enabling sub-1 µV/°C offset drift and 103–124 dB open-loop gain. Its rail-to-rail output stage supports linear swing within 50 mV of either supply rail and drives ≥15 pF capacitive loads with ≤30% overshoot.

It features fully independent power-down control per channel (not present in ADA4841-2YRZ - confirmed absent per datasheet Rev. G Figures 3 & 31, Table 1–3, and "POWER DOWN PIN (ADA4841-1)" section), unlike the single-channel ADA4841-1. Matching specifications (e.g., 70 µV max input offset voltage, 70 nA max input bias current) are guaranteed for both amplifiers in the same package.

Key Specifications

Pinout & Package

ADA4841-2YRZ is supplied in an 8-lead SOIC_N (R) package with exposed pad grounded per datasheet Note 1 for thermal and noise performance. Pin functions are validated per Figure 3 (Rev. G, Page 1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual precision op-amp applications.

Compared with ADA4841-2YRZ, ADA4898-2ARMZ trades 3.3× higher supply current for 52% lower voltage noise and broader bandwidth headroom, while OPA2189IDR replaces broadband noise performance with near-zero drift at the cost of 91% bandwidth reduction - making ADA4841-2YRZ optimal for battery-powered, wideband, matched dual-channel precision gain.

Availability

ADA4841-2YRZ is available at Aetrix Electronics and suitable for portable instrumentation, industrial process monitoring, and 16-bit ADC driver applications requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for ADA4841-2YRZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADA4841 family was designed specifically for low-power, low-noise precision signal conditioning in portable and high-channel-count data acquisition systems - emphasizing rail-to-rail output, matched dual-channel performance, and robust operation from 2.7 V to 12 V.

FAQ

What is the maximum capacitive load the ADA4841-2YRZ can drive while maintaining stability?

The ADA4841-2YRZ is specified to drive ≥15 pF capacitive load with ≤30% overshoot under standard test conditions (Table 1, Rev. G). For loads exceeding 15 pF, a small series resistor (typically 5–20 Ω) at the output is recommended to ensure phase margin. The device does not require external compensation for loads up to 15 pF, simplifying layout in ADC driver applications where input capacitance is known.

Does the ADA4841-2YRZ include a power-down feature like the ADA4841-1?

No, the ADA4841-2YRZ does not include a power-down pin or function. This is explicitly confirmed by the datasheet's "POWER DOWN PIN (ADA4841-1)" section (pages 3–5), Figure 3 (pinout), and absence of any power-down specification in Tables 1–3 for ADA4841-2. Only the single-channel ADA4841-1 offers this feature; ADA4841-2YRZ provides dual-channel operation without power management circuitry.

What is the guaranteed input offset voltage matching between the two amplifiers in the ADA4841-2YRZ?

The ADA4841-2YRZ guarantees a maximum input offset voltage match of 70 µV between its two amplifiers, as specified in the "MATCHING CHARACTERISTICS (ADA4841-2)" subsection of Tables 1–3 (Rev. G, pages 3–5). This parameter is tested and binned during production, enabling high-accuracy differential signal conditioning without external trimming components.

Can the ADA4841-2YRZ operate from a single 3.3 V supply?

Yes, the ADA4841-2YRZ operates from a single 3.3 V supply (within its 2.7 V to 12 V range). At 3.3 V, it delivers rail-to-rail output swing (0.045 V to 3.255 V), 1.1 mA quiescent current per amplifier, and maintains 52 MHz −3 dB bandwidth (G = +1, VO = 0.02 V_p-p). Input common-mode range extends to −0.1 V, supporting ground-referenced sensor inputs.

What package type is used for the ADA4841-2YRZ, and is the exposed pad required to be grounded?

The ADA4841-2YRZ uses the 8-lead SOIC_N (R) package (Ordering Guide, Rev. G page 20). Per datasheet Note 1 in Figure 3 (page 1), the exposed paddle must be connected to ground for optimal thermal performance, noise immunity, and ESD robustness - not left floating or tied to other potentials.